Process for preserving wood



T. DE LA MARE PROCESS FOR PRESERVING WOOD Filed April 17, 1925 2Sheets-Sheet l July 20 1926.

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July 20 1926.l

T. DE LA MARE PROCESS FOR PRESERVING wooD 2 Sheets-Sheet 2 I Filed April17, 1925 ation/w11 Patented .luly 20, 1926..

UNITED sTATEs 1,593,330 PATENT OFFICE.

THOMAS DE LA MARE, or TooELE, UTAH, AssIGNoR To ARTHUR v. SMITH, 'orMAM- MoTnr, UTAH.

PROCESSFOR 'PRESERVIN G WOOD.

I My invention relates to Wood preservation, and has for its object toprovide a iniw process for preserving the portions ot poles, posts,railway ties and other wood Wliichfare buried in the ground and subjectto rotting.

These objects ll accomplish with the present process which consists ofsurrounding the pole or other wood with creosote, metal, asphalt andconcrete, and saturating the wood thus surrounded with brine, and addingto the brine from time to time in order that capillary attraction willraise the brine above its normal level.

lln order that the process may be economil cally and successfully.carried out, l provide an apparatus by which ll apply the differentsteps of my process. As shown in the drawings to illustrate my processand the appa-k ratus by which it is carried out, Figure 1 is a verticaldiametrical section of the lower end of a pole with my apparatus thereonfor carrying out my process. Figure 2 is an elevation of a reinforcementcasing. Figure 3 is a plan view of one form of the apparatus. M Figure 4is a horizontal section ot the reinforcement casing shown in Figure 2.Figure 5 is a view in perspective of the apparatus used when my processis applied to preserving railway ties. Figure 6 is a transverse misection through the medi-al portion of the railway tie when the processis applied thereon; and Figure 7 is an elevation of the end of the sametie.

Some of the elements used by me in my process have been known and usedas wood preservatives, but not in the way ll use them, and theapplication has not been continued or repeated and never, so far asknown to me, have the different steps been used. ll will describe myprocess as applied to preserving telegraph or telephone poles as it willbe obvious that the process may be used to preserve any wood which ispartially buried in the ground, whatever form it may have or the use towhich it is put.

ln preserving a telephone pole A, a hole is centrally bored therein fromthe end to be placed in the ground and extending upwardly to near thesurface of the ground and opening into said hole is another hole Finclined upwardl and extending to the surface of the po e. A pipe orshort tube C has one end mserted within said hole B and the other endortion extends further up the pole and pretrably parallel therewith.

order that it will not interfere with the dipping of the lower endportion of the pole in creosote` said casing is made detachable bycutting the sheet metal out of which the said casing is made into stripsor quarters ofthe circumference and forming radially extended flanges 1on both side edges of each strip, which flanges are fastened together bybolts and nuts 2.

My process consists of filling hole A with salt; then covering therexterior of said pole with creosote and placing the pole in a hole dugin the ground larger than the pole; then placing the said casing Daround the lower portion of the pole and placing the said pipe C withinthe said casing D and its lower end within the upper end of said hole B,and filling the interior of said casing D with plastic asphalt E. Thenone or more reinforcing wires 3 are assed through holes in the upper endof the anges 1 of said casing D and plastic cement concrete F is pouredaround said casing D and filling the hole in the ground. The upper edgeof the concrete is tapered upwardly and toward the asphalt. Brine is tobe poured from time to time within the said tube C to dissolve the saltin the said hole A, 'and capillary attraction will cause the brine toralse and fill the ports of the wood and preserve all ofthe pole fromdecay up to and above the top of the asphalt.

lin preserving railway ties, the process is the same but the apparatusby which it may be carried out is changed in form, as shown in Figures5, 6 and 7. A longitudinal recess J is provided on the lower side faceof a railway tie by two narrow strips of wood 4, which arelongitudinally nailed to the bottom of said tie nea-r the lower corners,and a fiat board 8 is nailed to said strips and tie by nails Apassingthrough both the board and strips. hole 6 is bored laterally through thesaid tie and openin into said recess J. A sheet metal casing or ox 5 ismade larger than the tie and the recess forming members, and is to bespaced from the bottom and sides of said tie by a layer'of plasticmaterial, such as asphalt. In using m prooess for preserving a railwaytie, t e said recess J is filled with salt and the tie is placed in thebox 5, which has recesses 7 cut therein to receive the rails R, whichare to rest on the tie. The space between the inside of the said box 5and below and on the sides of the tie is then filled with plasticasphalt and the upper edges of the box are bent downwardly over theupper side of the tie, and a space surrounding the box 5 is then ouredfull of cement concrete; then, with iirine poured into said hole, thepores of the tie will be filled with brine and the tie will bepreserved.

Having thus described my invention I desire to secure by Letters Patentand claim 1. A process for preserving wood partially buried in theground which consists of providing an opening in said wood extendingfrom the bottom upwardly to near the surface of the ground; filling saidopening with salt; surrounding said wood with a layer of plasticasphalt; surrounding said asphalt with cement concrete and filling saidopening with brine.

2. A process for preserving the portion of wood which is buried in theground which consists of providin an openinv in the bottom of said woodto t ie surface oiP the ground; and partially filling said opening withsalt; and filling said opening and the voids of the salt with brinepoured from above the ground.

In testimony whereof T have aiixed my signature.

THOMAS DE LA MARE.

